基于FPGA的千兆以太网光纤转换器的设计

Design of optical fiber converter of Gigabit Ethernet based on FPGA

为了解决千兆以太网5类非屏蔽双绞线(1000BASE-T)最长传输距离为100m的瓶颈问题,选用了传输距离较远的光纤取代原有的5类非屏蔽双绞线。考虑网络成本,不改变原有发送与接收系统结构,设计了一种千兆以太网光纤转换器。通过基于现场可编程门阵列(FPGA)的光纤端和千兆以太网端数据格式的转换及控制模块的设计,实现了以太网双绞线和光纤两种介质间的相互转换。将该转换器应用于高清晰度LED显示屏的实时数字视频传输系统中,取得了良好的效果,实现了距离可达10km的实时数字视频传输,满足了未来一段时期内用户的需求,达到了设计的预期目标。

In order to solve the problem that the longest transmission of IO00BASE-T is 100 meters, the optical fibers with longer transmission distances were selected to replace the five kinds of twisted pair lines （IO00BASE-T） in Ethernet. In consideration of the network costs, an optical fiber converter of Gigabit Ether- net was presented by using the original structures of the sending and receiving systems, which could implement the conversion between the twisted pair lines and the optical fibers based on the conversion of data format and the design of control module on Field Programming Gate Array（FPGA）. This converter was used for the real- time digital video transmission system of a high definition LED screen with reasonable effects, and it implements a real-time digital video transmission up to 10 kin. The results prove that proposed optical fiber converter can meet the needs of users in a certain future, and can achieve the expected target of this design.